Filling and draining attachment for tanks



Nov. 6, 1951 R AHL 2,574,022

FILLING AND DRAINING ATTACHMENT I'OR TANKS Filed DeC. l5, 1948 4 Sheets-Sheet l y El El- A v l NOV. 6, 19.51' C P, DA1-" 2,574,022

FILLING AND DRAINING ATTACHMENT FOR TANKS Filed Deo. 15, 1948 4 Sheets-Sheet 2 I :E 1ST-.1?.

Y ays.

Nov. 6, 1951 ;I P, DAHL l 2,574,022

FILLING AND DRAINING ATTACHMENT FOR TANKS Filed Dec. 13, 1948 4 Sheets-Sheet 5 lEE..

JJ l

INVENTOR. Carrzazz,

BY mi am; new MM ifys.

Nov. 64, 1951 c. P. DAI-N. I '2,574,022 FILLING AND DRAINING ATTACHMENT FOR TANKS Filed Dec. 15, 194s j sheets-Sheen;

Patented Nov. 6, 1951 FILLING AND DRAINING-ATTACHMENT v Fon TANKS can P. Dahl, Euclid, ohio, ag's'ignor to The Parker Appliance Company, Cleveland, Ohio, a corporation of Ohio Application December 13, 1948, Serial No. 65,053

19 Claims. (Cl. 137-68) The invention relates to new and useful improvements in an attachment for tanksfor filling or emptying and draining the same.

An object of theinvention is tovprovide an attachment of the above type, which includes a housing having a poppet valve controlled inlet and outlet opening, ports leading from the housing to the tank, a fluid pressure controlled valve for closing said ports, when the tank is lled to a predetermined level and manually controlled devices for opening said valves for emptying and draining said tank. l u

A further object of the invention is to provide an attachment of the above type, wherein the poppet valve is provided with means which, when the poppet valve is opened, contacts with and opens the fluid pressure controlled valve. n

A still further object of the invention is to provide the means, whereby the poppet valve opens the fluid pressure controlled valve, with an actuating spring so positioned that the lastnamed valve may be'hclosed when the poppet valve is still open.

These and other objects will be in part obvious and will be in part hereinafter more fully disclosed. v

In the drawings:

Figure 1 is a vertical sectional view through a housing adapted to be attached to the fuelv tank and also showing. a portion of the nozzle 'attached to the housing", the valve'sbeing in closed position; l, 7

Figure 1a is a view showing in vertical section the rest of the nozzle, only aportion of which is shown in Figure 1;v

Figure 2 is a view similar to Figure l, but showing the valves in positionforthe filling of the tank;

Figure 3 is a view similar to Figure 2:1with the added feature of thev float control and with the f' fluid pressure valve closed for stopping the now of fluid to the tank when it is filled.l Y

The improvements have to Vdo with an attachment for filling, emptying and draining a fuel tank, which is particularly adapted for use in aircraft, and the refueling of the tank from the underside thereof. The vattachment includesa housing which is adapted to be Xedly connected to a wall of the tank. The housing is preferably disposed within a tank and connected to the bottom wall thereof. The housing has an opening at the lower side thereof which is surrounded by a valve seat and an inwardly Aopening poppet valve is normally spring pressed against the seat for closing the same;v The poppet valve is 2 mounted on a stem which reciprocates l in a spider disposed within and Ysecured to the hous-fV mg. surrounding the opening in the lower end of the housing is a second valve seat, and just above this second valve seat is a port/'leading from vthe housing to the tank. These ports'are controlled by a cylindrical valve mounted in the housing, which valve is free to movein the housing't'o uncover or toU close the ports. There is a spring for moving the valve towards closed position. There is a sealing gasket between the valve and the inner'wall of the housing'disposed above the ports' in the housing which lead to the tank and this sealing gasket divides the housing into upper and lower chambers. 'There is an opening through the valve leading to the upper chamber so that the Valve may be opened by uid pressure and closed by iiuid pressure when the tank is filled to a lpredetermined level.

There is means for attaching the nozzle to the housing in alignment with the opening inthe bottom portion of the housing so that the tank may be filled or emptiedand drained through this opening when the nozzle is attached'thereto. IThere is a control valve in the nozzle and mechanical means for opening and closing the same. This nozzlevalve is adapted to move the poppet valve to open position for the filling of the tank orfor the emptying of the tank. To this end there isa yielding meansbetween the stem of the poppet valve and the upper end of the cylindrical valve sothat said cylindrical valve can be moved by fluid pressure'to closed posi: tion while the poppetvalve is still held open.

Referring more indetailto the drawings, the improved attachment for filling, emptying and draining va tank includes a housing indicated at I0 Yin the drawings. This housing is secured to the bottom wall lI I of the tank. The bottom wall has an opening therethrough 'and the housing extends through the opening and the greater part thereof is located in the tank. At the lower end of the housingis a laterally projecting flange l2 which engages the underside of the bottom wall of the tank. The housingis secured to the tank bybolts I3 which pass through the flange and are threaded into a clamping ring I4 on the inside of the tank. There is a sealing gasket I5 which seals the `connection between the housing and the wall of the tank. l

A sleeve I6 is attached to the lower end of the housing and forms a part thereof. Said sleeve' has a projecting flange 'Il 'and this flange vis secured bybolts I8 to the lower end of the. hous-y At a short distance above the valve seat swiped ing. There is a sealing gasket I9 which makes the connection between the sleeve and the housing uid tight.

Said sleeve has an inwardly projecting ledge 20 having an opening 2| therethrough and this opening is `for the purpose of filling the tank or emptying and draining thetan-k.v Theu'pper' side of `the ledge 2U provides a valve seat 22 which surrounds this opening 2 l. A poppet valve 23 carries a ring gasket 24 which is adaptedto engage the valve seat 22 for closing the opening 21. This ring gasket 24 is secredto theiopmptv valve by means of a plate 25 and bolts 26. This plate 25 also serves as a means for attaching a valve stem 21 to the poppet valve. Thevalve stem 21 is free to reciprocate in a bushing 28 mounted in a depending sleeve 29 formedrasifa part of a supporting spider 30. this supporting spider rest on the upper 'ed Vof the sleeve i6 and are secored thereto by screws 3 I.

There is aspr-ing 3-2-disposedibetween the spider andthe poppet valve and this-spring' -frnove's the viveto closed position; The housingata short distaioeabove Vthe sleeve 156 is-provided-with an inwardly project-ing ledge 3'3 andthe upper 'f'lace of `this ledgel provides a valveseat. Justabove or' in a line with the valve seat 'are ports v3:1 which leadv tothe tank labovethe 'bottom walll Il'. The tank is filled with fuel through these ports` 34 and it may -be also emptied and drained through these ports.

` Mounted in the housing is a cylindrical valve 35. Said valve carries a gasket 36 which is attachd to the lower end thereof by a sleeve 31. This gasket engagesr the valve 's'at the cylindrical Vvalve is' lowered vfor" the closing of the opening. The housing has an ifset'c'yii'rdrieai portieri 33 adjacent 'the upper" nd ther'ef and the Voylindrical valve A3'5 is provided with a projecting portion havinga Arecess 3@ which is vlocated a gasket 40 tl'iatcontacts with the wall of the housing 'and makes a tight fluid sea1"so that the housing is separatedinto an upper chamber 4i and a lower chamberv42. n

V`There is a passage 43 .connecting this `lower chamber with the upper chamber so that uid passing into the lower chamber may pass through this passage 43 into the upper chamber.

The upper end of the housing is closed by a closure head 44 having integral upwardly ex-` tending portion 45'. The upper end 46v of the cylinder is provided with an integral cylindrical portion 41 which extends downwardly arshort distance into the chamber 42 and extends up; wardlyinto the portion 45 of thefcl'o'sure 'headll The upper end of this portion 41 'is closed.

vAt the lower end of this portio`nf414 of `the`=`cy`li`ndrical head there is a shoulder 48 against 'which a plate' 49 is rmly'secured by means VVVofl a :locking 50. Within this yportion 4-1 of the -cylindrical head is a cap '5I provided with a 'flange 52'. The flange of this cap rests on the plate 419. -A spring 53 bears at its upper end agains'tfthe closed end of the cylindrical portion 41 arida-t its lower end the spring bears against the flange of the cap This spring tends to move the "ca'p' 5| toward the plate 48. Y

There is another Spring 54Y which surrounds the cylindrical portion A41. Thisfspriri'g,bearsh'against the upper closed end 55 of the por'tion`45-and A'at its lower end it bears against the head of the cylindrical valve. This spring tends to' 'move the cylindrical valve to closed position with' the seale ing gasket 36 VVcarried thereby in sealing 'engage'-u The arms of l ment with the upper seat 33 and thus closing the ports 34.-

A nozzle shown in part in Figures 1, 2 and 3 and in part in Figure 1a is adapted to be attached to the sleeve I6 forming the lower part of the housing. The nozzle includes an inner sleeve member `56``and"aniouter sleeve eouplingf'paiit 51. The inner sleeve member 56-i`s-insrtedin the sleeve I6 and the end of the inner sleeve contacts with tle ledge 20. There is a gasket 58 which makes a-iiuid tight seal between the nozzle and the houslng:

N The sleeve I6 has vlaterally projecting lugs 59. VThe sleeve 51 is provided at its upper end ahold-ing' ring 60 having slots through which th"1ugs"59-'pass, after which, by turning of the-lockingsleeveff51 the nozzle will be tightly connected to the housing. There are spring pressed' lugs 6l adapted to engage recesses or notches 62 in the sleeve I6, which prevent the inneri-ielnbe' of tthe nozzlertromtu'rning when it i's'atta'chedl to the h'sing.

This means offa'ttach-ingfthe 'nozzle to vthe housing foi-ins' no p" t of -the-pre`serft invention, butfis' "Sl-ioviin,` desc edv olained in the Acoipe'nding application 'of R'obert- Davies) Ser. No. '15453-623` fled l`-2, 19451-,novi?v Patent No; 2.5139358.' ofAugustVQZ, 1950i` l'Il'.he inner sleeve menib'er of thefnOz'z-leis provided withavalve seat 63. Mo'unte'c.'nthenozzleeis va valve-64having a gasket l65 'which -is-'adapted 'ft engage the valve seat 63 for tightly closingl thendzzle'. This valve 64 isl carried by a sh'aft mounted a ported partitionj' for reciprocati'oh. 'The slaaf-t has a reduced portion 66a; See-Fig'. 1a.!) Al\'7lounted on the reduced portion i's-a collar163foiined as fa part of -a rac'kjbar :6'9 As'pri-r'igr 'I6-isl ispese'd be'- tween "the'collar Giand the -nut y1 threaded onto the lower yend of the y'reduced portibn-"Bfa,

The rack bar' V69 -p'rvidd 'with gear' teeth i2 which mesh' withagar F3i carried by'shaft T4. The" rack` 'ba'r entends-"through a partition plate 16 and is guided thereinla-nd held in mesh with `theigearwheel '132. Any Asiii-table mechanical'means nay bepiovided for' rotating a shaft 14 such as a `hand crank. The sleeve 51 Awhich couples the nozzle member tothe j hou'sin'g' is provided with later" ly projecting handles 15, 15, which are used; foiiplacing 'the' nozzle and `turrii-ng the locking'hsleeve lfbi',jioi'nifng Itl'ie nozzle to the housing. The' means" for turning' Ytle'-'sleevel vand also for the opening and closing of the 'jalve is not clair'ned 'hrer'i". 'fisfshownfan'd claimed in tnecopndirig application supra. Y

This is a pipe 11 which eXten'ds/"frdn the upper end 'of the 'hbiisi'iig 'to *a fp oint adjac'ent "the top of thetank. Montedion-'a ibracket-18 i's a rlever' 19 carryinga oat 80 and the lever is pivoted at 8l "and, is adapted to "raise 'a needle Avalve l82 in order fto close the 'oioeriing' the elbow housing 83 at the `upper'end -of thepip'e r11. When vthe fluid in the tank is below a predetermined level the' float' 80 `dro'ps arid releases the needle valve 8'2"so that it moves to open position. When it is desired to jll 'the `tank the `nozzle lis 'attached to the tank in the manner described above. The valve 64 within the 'nozzle is "closed when the nozzle is `atila'che'd to the tank. Sometimes the pipe "carrying the nozzle' is `attached "to a iiuid supply which 'is'und'e'r pressure, in "which c'as'e the valve, in Yolos'ecl position, prevents 'any 'leaking' 'of the'u'id'ffroin the nozzle. Then againthe `pipe asseiatediwitn IVthe "emay be connected with tl'ie'iiui'd supply 'sofcontrolled that 'there ris no pressure onthe' nozzle when itis 'attached 'to the acuosa tank., Inwhch caseit may be desired toopen vthe nozzle valve before the fluid Aunderpressure is admitted to the pipe leading to the nozzl e.

In order to fill the tank after-the'4 nozzle is attached, theshaft 14 Ais turned in av clockwise direction and this will raisethe rack bar-559, bringing the collar 68 into Contact with `theshoulder VIa of the shaft 66 vwhich carries the valve E4. The raising of thevalve 64will bring it `into contact with the poppet valve 23 andimove said poppet valve off. from itsseat. v

In Figurel of the drawings, the nozzle is shown attached ready for the opening of theY valves.

In Figure 2, the poppet valve is moved toa positionrso that it engages the valve .63. and moves it to its extreme upper limit. If .thereis fluid under pressure in the nozzle when the .valve 64 is open it will flow past the poppet valve and vinto the chamber`42. Thefluid will contact` with the underside of the head of the cylindrical valve 35'and this will move the cylindrical valve solas to open the ports 34 and the `fluid will freely flowv from 4the housing into the tank. However, the ports 34, or if preferred, the opening between the valve 35 and its seat 33 when the valve is open, is made with a somewhat smaller total cross-sectional area than the opening past the valve seat 22 whenthe poppet valve 23 is open and therefore fluid can .enter the housing unit from the nozzle faster than it can pass into the tank. This results in a building up of pressure in the chamber 42 which tends to keep the cylindrical valve 35m its upward or open position.

If there is no fluid under pressure in the nozzle when the valve 64 is open then the lifting of the poppet valve 23 by the opening of the valvel E4 will cause the stem 21 of the poppet valve to engage the cap 5l. The spring 53 has a greater rate than the spring 54 and, therefore, the cylindrical valve 35 will be raised without any appre ciable collapsing of the spring 53 until thevvalve i 35 reaches its fully raisedposition. In other words, if there is no fluid pressure on the line when the valve in the nozzle is open the opening of this valve moves the poppet valveawayfrom its seat and also moves the cylindrical valve so as to open the ports and when the fluid pressure is then turned on it will pass into the housing and from the housing into the tank.`

Since the fluid within the chamber-42 is lunder pressure, it passes through the opening "43 in ythe head of the cylindrical valve, filling the upper chamber 4I and flowing upwardly through the pipe 1'! and past the needle valve 82 tothe interor of the tank. The needle valve is open while the tank is being filled since the float 80 is in its lower position.V The passage through the pipe 11 and needle valve 82 is relatively larger than the opening 43 whereby the uid may pass from the chamber 4| more quickly than it can enter through the passage 43. This results lin a lower pressure for the fluid within the chamber' 4| than that in the chamber 42, the" differential in the pressures tending to keep the valve 35 lin the open position.

When, however, the float is raised to a predetermined position it will close the needle valve so that no further fluid in the pipe can pass therethrough. This will cause the pressure in the chamber 4I -to be equalized with the pres'- sure in the chamber 42. The upper side pf Ythe head of the cylindrical valve is of ygreater area than the underside and, therefore, there is a differential in the total pressures acting on the ppposite Vsides 0f the =Qy1i11dria1ya1ve 35w.hi. 1i

6 isA .brought about by the closing of the needle valve. This differential in pressure is effective for moving the cylindrical valve 35 to its closed position against the seat 33.

There are openings IUa in the housing just below the head of the cylindrical valve. The lower end ofthe cylindrical valve is a guide nt with the inner surface of the housing IB. Any fluid trapped between the cylindrical valve and the housing will iiow ou-t through these openings |0=3L and this permits the cylindrical valve to moveto closed position under the differential pressure referred to above. When the valve 64 was moved to full open position, the spring 53 was partially collapsed. Movement of the valve 35 to closed position by action of differential fluid pressure overcomes theA spring 53 still farther so that it will be further collapsed as shown in Fig. 3. While this ycylindrical valve 35 may be forced to open position by the pressure of fluid within the chamber 42, it is mechanically connected to the poppet valve 23 by means of the spring 53. The spring 53 is stronger than the spring 54 and therefore Will lift the cylindrical valve 35 off its seat upon opening of the poppet valve even though there is no fluid pressure within the housstopped by theclosing Yof the cylindrical valve 35.i

The nozzle valve 64 may then be moved manually tov closed position, and as it moves to, closed position the poppet valvewill likewise move to closed position. When these two valves are closed then the nozzle can be disconnected.

When the tank is to be emptied, the nozzle is connected to the tank in the manner described above. The pipe associated with the nozzle is, of course, free from any liquid under pressure Vand isconnected to a tank into which the fluid is to be emptied and drained from the main tank. The operator then `turns the shaft 14 and moves the valve 64 to full open position. This will cause the poppet valve to be moved to full open position and the poppet valve stem contacting with the cap 5I will move the cylindrical valve 35 to full open position. When the valves are all open the fluid will flow from the tank into the nozzle and thus the tank may be emptied either partially or fully and may be drained through the ports 34 which are Vthe same ports -through which the tank was filled.

vIt will be noted from Fig. 1 that there is a spacel between the upper end of the stem 27, and the opposed surface on the cap member 5l when the poppet valve 23 is in the closed position. This space is provided for the purpose of permitting. a difference in the distances through which the poppet valve 23 and the cylindrical valve 35 travel from their respective closed to open positions. It is normally desirable to have the poppet valve travel a considerable distance to reach its fully opened position. On the other hand, it is desirable Afrom the standpoint of minimizing the bulk and weight of the housing member I to have the cylindrical valve 35 travel only ashort distance. Theinitial space between the stem 21 and the cap 5| in effect provides a lost motion connection between the poppet valve 23 and the valve 35 and partially accommodates the differ. ence in the opening travel. The remainder. ofv

fas-niece :7 I tnedinerence is,V accommodated by the partial collapsing of the spring 53- after Athe valve S51-has reached* its fully op'en position and while the poppet valve is moving in the last portion of its opening travel.

Although but one specific form of the "invention 'is' illustrated in the drawings 'it isA obvious that many changes may be `made in the detail construction without departing from the subject matter of the `present invention. Forexample, the valve v23 instead of being of the poppet'y type may be of other well known types. Thus for instancethe packing Zil'may be soarrang'ed that i-twill seat upon a cylindrical surface rather than' ont-he transverse face 2'2. Valves '6'5 and '35 may likewise'be so arranged, or'in 'any' other equivalent manner.

Also, the nozzle for 'connecting to Ithe tank valve unit of the present invention may be of a design other than the one speciiic'ally illustrated and may even be power operated rather than manually operated.

I claim:

-l. A device for use in fillingtahks comprising a housing adapted to be attached to the wall of a tank, said housing having an opening through which the tank may be filled or emptied, Va rst valve for controlling said opening, said housing having a port forconnecting the interior of the housing with the interior of the tank, a fluid pressure controlled valve for automatically clos- -in'gv said port when the tank is iilled to a predetermined level, said rst valve being adapted to be opened by any suitable means exteriorly of 'the housing, said valves being disposed in said hous- I i' ing and movable in the same direction when opened and means connecting the 'two valves for opening the fluid pressure valve upon opening of the rst valve. Y

2. A device for use in filling tanks comprising a housing adapted to be attached tothe wall of a tank, said housing having an opening through which the tank may be filled or emptied, a iirst valve for controlling said opening, said housing having a port vfor connecting the inter-lor voi" the housing with the interior of the tank, a uid pressure controlled valve for automatically closing said port when the tank is filled to a predetermined level, said first valve being adapted 'to be opened by any suitable means exteriorly of the housing, and means connecting the two valves for' opening the fluid pressure valve upon opening of the first valve, said means being yieldable for permitting the fluid pressure valve to be moved to closed position by fluid pressure Vwhile the rst valve is still open.

3. A device for use in Yfilling tanks comprising a housing adapted to be attached to the wall of a tank, said housing having an opening through which the tank may be nlled or emptied, a 'n-rst valve for controllingvsaid opening, said housing having a port for connecting the interior 'of the housing with the interior of the tank, a iluid pressure controlled valve for automatically closing said port when the tank is filled to a predetermined level, said first valve being adapted to be opened by any suitable means exteriorly ofthe housing, a spring interposed betweenesaidvalves for opening the fluid pressure valve upon opening of the nrst valve and yieldable to permit 'the fluid pressure valve to be moved Vto closed position by uid pressure while the nrst valve is still open.

4. A device for use vin nlling `tanks comprising a housing adapted to be attachedto the wall` 'of Aa tank, said housing havin-g an opening through whihthe tank may be 1li-lied 1or emptied, anrst valveffor controlling Vsaid opening, saidwhousing having Yafport for connecting. the interior of the housing withthe `interiorof the tank, a fluid pressureo'peratedv valve for a'utomaticallyclosing 'said portwhen the tank fis filled to a predetermined level, a spring constantly urging said :duid pressurevalve to closedposition, saidrst valve being adapted to be opened byV 'any suitable means eX- teriorl'y of the housing, a spring interposed be'- tween said valves-.for opening the Afluid pressure valve againstthe action of the first mentioned spring upon opening of the. rst valve and yield'- able to permitthefluidpressurevalve to be moved to closedposition by fluid pressure While the rst valvei's still open.

5; A device for use in :filling tanks comprising ahousing adapted to be yattached to the Wall of a tank, said housing Ahaving an `opening through which the tank may be filled 'or emptied, av first Valve for controlling said opening, said housing having a port for connecting the interior of the housing with the interior vof thetank, a fluid pres'- sure operated valve for automatically closing said port when the tank isv lled to a predetermined level', a spring 'constantly urging said fluid pressure valve to closed position, said rst valve being adapted to be opened by any suitable means exteriorly of the housing, a spring interposed between said valves for opening the fluid pressure valve against the action of the first mentioned spring upon opening of the first valve and yieldable to permit the huid-.pressure Valve to be moved to closed position by fluid pressure While the rst valveis stillopen, said second mentioned spring having a greater rate than said nrst mentioned spring.

6-. .A device for use in filling tanks comprising a housing adapted to be-attached to the wall of a tan-k, said housing having -an opening through whichia tank may be filled or emptied, a nrst valve forV controllingsaid opening, said housing having aport for connecting the interior of the housing with 4theinterior of the tank, -a fluid pressure operated valve within said housing and having a portiondividing the housing into upper and lower chambers, said rst rvalve being adapted to be opened Icy-any suitable mea-ns exteriorly of Vthe housing, said valvesbeing disposed in said housing and movable in. the same direction when opened means connecting the two valves for opening the fluid pressure valve upon opening of the first valve, said huid pressure valve being responsive to a differential in the total nuid pressures within said chambers for closing said ports.

7. A device for usein nlling tanks comprising a housing adapted tor-be attached to the wall of a tank, said housing vhaving an opening through which a tank may be illled or-emptied, a nrst valve for controlling said opening, saidrhousing having aport for connecting the interior of the housing with the interior of the tank, a fluid pressure operated valve within said housing and having a portion dividing the housing intolupper and lower chambers, means for admitting fluid into said chambers, said first valve being adapted to Abe opened vby any suitable means 'exteriorly of the housing, means connecting the two valves for opening the rfluid pressure valve upon opening ofthe rst valve, unequal areas on Vsaid fluid pres'- 'sure `valve subject to the pressure of fluidV Within said chambers andeifective when the unit pressures of 'u-ids within said chambers are substantially vrequalized to cause said fluid pressure valve tomove tocl'osed position, means for maintaining unequalized unit flu-id pressures in said-chambers while the tank is being filled, and means responsive to a predetermined level of liquid within the tank for substantially equalizing the unit fiuid pressures within said chambers.

8. A device for use in'iilling tanks comprising a housing adapted to be attached to the wall of a tank, said housing having an opening through which fluid under pressure may be admitted to the interior of said housing, a first valve for controlling said opening, said housing having a port for connecting the interior of the housing with the interior of the tank, a fluid Vpressure operated valve for controlling said port, said first valve being adapted to be opened by any suitable means exteriorly of the housing, yieldable means connecting the two valves for opening the fiuid pressure valve upon opening of the first valve, said fluid pressure valve having an area subject to the pressure of fiuid entering through said opening for urging said fluid pressure valve toward open position, and means for automatically causing fluid pressure valve to close said port when the tank has been filled to a predetermined level.

9. A device for use in filling tanks comprising a housing adapted to be attached to the wall of a tank, said housing having an opening through which fiuid under pressure, may be introduced into the interior of `said housing, a first valve for controlling said opening, said housing having a port for connecting the interior of the housing with the interior of the tank, a fluid pressure operated valve for controlling said port, said first valve being adapted to be opened by any suitable means exteriorly of the housing, and means connecting the two valves for opening the fluid pressure valve upon opening of the rst valve, a bleed passage connecting the interior of the housing with the interior of the tank, means effective when both said valves are open and the tank is being filled for forcing incoming fiuid through said bleed passage, means for closing said bleed passage when the tank has been filled to a predetermined level, and means responsive to the closing of said bleed passage for causing the fluid pressure operated valve to close.

10. A device for use in filling tanks comprisingV a housing adapted to be attached to the wall of a tank, said housing having an opening through which fiuid under pressure may be introduced into the interior of said housing, a first valve for controlling said opening, said housing having a port for connecting the interior of the housing with the interior of the tank, a fluid pressure operated valve for controlling said port, said first valve being adapted to be opened by any suitable means exteriorly of the housing, and means connecting the two valves for opening the fluid pressure valve upon opening of the first valve', a bleed passage connecting the interior of the housing with the interior of the tank, the passage for fluidthrough said fluid pressure valve controlled port being smaller ythan the passage through said opening when both `valves are open whereby sufficient pressure will be maintained on the fluid within said housing for forcing it' through said bleed passage, means for closing said bleed passage when the tank has been filled to a predetermined level, and means responsive to the closing of said bleed passage for causing the liuid pressure operated valve to close.

1l. A device for use in filling tanks comprising a housing adapted to be attached to the wall of a tank, said housing having an opening through which the tank may be filled or emptied, a first valve for controlling said Opening, Said housing gl O having a port for connecting the interior of the housing with the interior of the tank, a fluid pressure controlled Valve for automatically closing said port when the tank is filled to a predetermined level, said first valve being adapted to be opened by any suitable means exteriorly of the housing, and means operableV after the initial opening movement of said first valve for opening the fiuid pressure valve upon further opening movement of the first valve. A

12. A device for use in filling tanks comprising a housing adapted to be attached to the wall of a tank, said housing having an opening through which the tank may be filled or emptied, a rst valve for controlling said opening, said housing having a port for connecting the interior of the housing with the interior of the tank, a fluid pressure controlled valve for automatically closing said port when the tank is filled to a predetermined level, said first valve being adapted to be opened by any suitable means exteriorly of 'the' housing, and spring means interposed between said valves and effective after the initial opening movement of said first valve for opening the fluid pressure valve upon further opening movement of the first valve.

13. A device for use in filling or emptying tank comprising a housing adapted to be attached to the wall of a tank, said housing having an opening through which the tank may be filled or emptied, a valve seat surrounding said opening, a normally closed poppet valve for said opening,A said housing having a second seat disposed in-r` wardly from said first valve seat, ports in the housing leading to the tank above saidsecond named valve seat, a fiuid pressure operated valve for automatically closing said ports when the tank is filled to a predetermined level, said poppet valve being adapted to be opened by any suitable means exteriorly of the housing, and said valves being disposed in said housing and movable in the same direction when opened means connecting the two valves for opening the fluid pressure valve upon opening of the poppet valve. i l f 14. A device for use in filling or emptying a tank comprising a housing adapted to be attached to the wall of a tank, said housing having an open-- ing through which the tank may be filled or. emptied, a valve seat surrounding said opening, a spring closed poppet valve for said opening, said housing having a second seat disposed inwardly from said first valve seat, ports in the housingu leading to the tank above said second named valve seat, a normally closed fluid pressure operated valve for automatically closing said ports whenv the tank is filled to a predetermined level, a spring disposed between the fiuid pressure valve and the poppet valve, said poppet valve being adapted tov be operated by any suitable means exteriorly of the housing, said spring operating to open thev fluid pressure valve upon opening of the poppet valve and permitting the fluid pressure valve to be moved to closed position by fluid pressure while the poppet valve is still open.

15. A device for use in filling or emptying tanks comprising a housing adapted to be attached to the wall of a tank, said housing having an open.v ing through which the tank may be filled orv emptied, a valve seat surrounding said opening, a poppet valve for closing said opening, a stem fastened to said valve, a spider in said housing having a bearing in which said stem is mounted for reciprocation, a spring between the spider and the poppet valve for moving the same toward closed position, said housing having a second valve seat disposed inwardly from the first valve seat,

ing the fluid pressure valve, said springnmeans permitting the fluidA pressure valve to close while the poppet. valveremains openposition.

1-6. A; device for use-in-lling or `emptying the tank eomprising a housingadapted to -be attached to the'wallfof a.tank, said housing having an opening through which' the tank can be nlled or. emptied, a 'valve seat surrounding. said opening, a poppet. valve for' closing said opening, a. stem fastened to. -said poppet valve, a. spider in said housing having a bearing :in which said stem is mounted forreeiprooation, -a spring betweenV thel spider land the. poppet. valve for moving thesame.

toward closed position saidhousing1having a.

second valve seat. disposed inwardly from the rst valve seat, ports in the housing; leading tothe tank above said second named valve seat, a iiuidf. pressure operated valve for automatically Closing said ports' when the tank is filled-to Aa prede.- termined` level, -saidzfluidpressure Valve including an extension for housing-a spring, apap withinl Y Said extension, a spring 4E )ea-ring onf the cap at its lower end and onthe housing extension at its'upper end, said capbeing in alignment with the stem of the puppet valve. whereby` when said poppet, valve is opened thefstem will engage the cap and throughgthe spring move the'uid pres sure valvey to open position, a spring between the upperpend` of the housingl andthe fluid pressure valve tending to move.` said. Valve towardclosed position, said last .mentioned .spring having a lowerrate thanv the; spring within saidfhousing extension, said -poppet vvalve being adapted to beV opened by any suitable means exteriorly .of the housing.

17. A device for.` use inflling'or'emptyinggtanks comprising a housing adapted. to-.be attachedto the wall. oixa tank,v Said. housnghavingan opening through which.V the tank may b e filled or; emptied, avalve seat surrounding said. opening, a spring closed poppet valve for said. opening, said housing havinga. second valve seat disposed. inwardly from `saidiirst valve seat, ports in the.

housing leading. to the tank. above said secondnamed valve-seat for llingoremptying saidtank,

a cylindrical valve-having a valve'faoeat the lower. end thereof adapted to engage saidseeond valve.

seat for closing said ports, said cylindrical valve having an enlarged'olosurehead at theupper endv thereof, a gasket carried by said head and .en-v

gaging the inside wall of theihousing for dividing;

said' housingxinto upper and lower chambers, said head having a relatively small opening oonnect-4 ing said chambers whereby iiui'dl maypass from the lower chamber to `thexupper .chambena pipe having fluid connection with. said upper chamber and adapted' to extend upwardly in a tankto a point adjacentthe upper side thereof, a iloat controlled needle valve f or closingan opening leading to saidpipe when ythe fluid in the tankreaohes a predetermined level, a springldisposedbetween said cylindrical valve and the 'p oppet valve, said poppet valve being adapted to be. opened by any suitable means exteriorly of; the-- housing, said spring operating to open the cylindricalfvalveupon opening of the poppetI valve and permitting said cylindrical valve to be movedY by Huid-pressure to closed position while the poppet valve is still open.

18. The combination of a housing adapted to be. attached to the wall o f a tank for -lling or emptying the tank, said-housing-hayinganopening through- Which thetank may, be filled or emptied, a poppet valve for controllingv saidopen-r ing, said housing having a: port for -conneoting the interior of the housingl with the interior of the tank, a fluid pressureoperated valve for automatically closing said port when said tank is filled to a predetermined level, said valves being disposed in said housing and movable in the same direotion when openedrv means connecting the two valves for opening the fluid pressure Valve upon openingof thepoppet valve, a nozzle adapted tobe attached to the housing through which the tank' may be yiilledy or emptied', ,andl means on said nozzle. for openingsaid poppet Valve.

1 9. The combination'of alhousing adapted tobe attached to the wallof atankforllingor'empty-4 ing the tank, said housing having an open-ing.4 through which the tank may belled or emptied, a valve seat surrounding `said opening, -a spring closed poppet valve for saidopening, s aid housing having Ya second valveseatfdisposedinwardly from. said first valve seat, portsv in the housing leading to the tank above said second-.named valve-seat.

for lling or emptying said tank, a fluid pressure operated valve for automatically closing said ports.v

when the tank is lled to. a predetermined level, a nozzle.. adapted to be attached to the tank for filling or emptying the-same, a valve. associated with the nozzle,.manual `means for opening the nozzle valve, said nozzle valve being disposed s o that. when moved to open positionit will engage said poppet valve and through said spring open. said fluid 'pressure valve, saidy spring permitting said fluid pressure'valveto b emoved to closed position by fluidpressu-rewhile saidpoppet. valve sstill open- CARL P. DAI-IL.

` RlizlnsRENCES. orrED The following references are of record in the le of this patent:

UNITED STATES.. PATENTS.

Number Name Date 269,886 Semple Jan. 2, 1883 295,691 Tobey Mar. 25, 1884l 596,145 Young Oct. 3, 1893 696,135 Curtis Mar. 25, 1902 '703,805 Murray July l, 1902 2,143,204. McCormack Jan. 10, 1939 2,211,237' Langdon Aug. 13, 19.40

2,384,628 Krone Sept. 11, 1945 FOREIGN. PATENTS Number CountryA Date 347,338 France of 1905. 

